Cod sursa(job #2284642)

Utilizator cosceexcosceex cosceex Data 17 noiembrie 2018 12:12:39
Problema Range minimum query Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.79 kb
#include <bits/stdc++.h>

using namespace std;

ifstream f("rmq.in");
ofstream g("rmq.out");

int RMQ[17][100001],v[100001];
int minim(int a,int b)
{
    int imin=9999999;
    for(int i=a;i<=b;i++)
        if(imin>v[i])
            imin=v[i];
    return imin;
}
int main()
{
    int n,m,x,y,s;
    f>>n>>m;
    for(int i=1;i<=n;i++)
        f>>RMQ[0][i];
    s=log2(n);

    for(int i=1;i<=s;i++)
        for(int j=1;j<=n;j++)
            RMQ[i][j]=min(RMQ[i-1][j],RMQ[i-1][j+(1<<(i-1))]);
//    for(int i=0;i<=log2(n);i++)
//    {
//        for(int j=1;j<=n;j++)
//            g<<RMQ[i][j]<<" ";
//        g<<'\n';
//    }
    for(int i=1;i<=m;i++){
        f>>x>>y;
        int p=log2(y-x);
        g<<min(RMQ[p][x],RMQ[p][y-(1<<p)+1])<<'\n';
    }
    return 0;
}